<template>
  <div class="cmt-container">
    <h3>评论子组件</h3>
    <hr />
    <textarea v-model="msg" placeholder="请输入要评论的内容(最多吐槽120字)" maxlength="120" name id cols="10" rows="3">

    </textarea>
    <mt-button type="primary" size="large" @click="postComment">
        发表评论
    </mt-button>
    <div class="cmt-list">
        <div class="cmt-item" v-for="(item,index) in comments" :key="item.add_time">
            <div class="cmt-title">
                第{{index+1}}楼&nbsp;&nbsp;用户:{{item.user_name}}&nbsp;&nbsp;发表时间:{{item.add_time | dateFormat}}
            </div>
            <div class="cmt-body">
                {{item.content === 'undefined' ? '此用户很懒,啥都没说':item.content}}
            </div>
        </div>
    </div>
    <mt-button type="danger" size="large" @click="getMore">
        加载更多
    </mt-button>
  </div>
</template>

<script>
import { Toast } from 'mint-ui'
export default {
    data(){
        return{
            pageindex:1, //默认展示第一页数据
            comments:[], //所有评论数据
            msg:''//评论输出的内容
        }
    },
    created(){
        this.getComments()
    },
    props:['id'],
    methods:{
        //加载评论
        getComments(){
            this.$http.get('api/getcomments/' + this.id + "?pageindex=this.pageindex").then(result=>{
                if(result.body.status == 1){
                    // this.comments = result.body.message
                    this.comments = this.comments.concat(result.body.message)//获取新数据追加数据
                }else{
                    Toast('获取评论失败')
                }
            })
        },
        // 加载更多
        getMore(){
            this.pageindex++;
            this.getComments();
        },
        // 发表评论
        postComment(){
            
            if(this.msg.trim().length == 0){
                return Toast('发表评论失败,内容不能为空')
            }else{
                this.$http.post('api/postcomment/' + this.id,{ content:this.msg.trim() }).then(result=>{
                    if(result.body.status == 0){
                        var cmt = {
                            user_name:'匿名用户',
                            add_time:Date.now(),
                            content:this.msg.trim()
                        };
                        this.comments.unshift(cmt);
                        this.msg = " "
                        console.log(this.comments)
                    }
                })
            }    
        }
    }
};
</script>

<style lang="scss" scoped>
.cmt-container{
    h3{
        font-size:18px;
    }
    textarea{
        font-size:13px;
        margin:0;
    }
    .cmt-list{
        margin:5px 0;
        .cmt-item{
            font-size:13px;
            .cmt-title{
                line-height:30px;
                background:#ccc;
            }
            .cmt-body{
                line-height:30px;
                text-indent:2em;
            }
        }
    }
}
</style>